Clamp for pipe-joints of the bell-and-spigot type.



1 J; CLARK. I CLAMP FOR PIPE JOINTS OF THE BELL AND SPIGOT TYPE.

APPLICATION FILED MAY 20, 1912.

1,051,087, Patented Jan.21, 1913.

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J. CLARK.

CLAMP FOR PIPE JOINTS OF THE BELL AND SPIGOT TYPE.

APPLICATION FILED MAY'20,1912

1,051,087 Patented Jan.21, 1913.

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' ably of rubber) over having applied thereto'my preferred J'& IbisCLARK, 0F BRADFORD, PENNSYLVANIA, ASSIGNOR T0 B. DRESSER MANU- FACTURINGCOMPANY, OF BRADFORD, PENNSYLVANIA, A CORPORATION OF PENN- stave-1am.

Specification of Letters Patent.

Patented Jan. 21, 1913.

Application filed May 20, 1912. Serial No. 698,562.

To all whom it may concern:

Be it known that I, JAMES CLARK, a citizen of the United States,residing at Bradford, in the county of McKee-n and State ofPennsylvania, havefinven'ted certain new and useful Improvements inClamps for Pipe-Joints of the Bell-and-Spigot Type; andI do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

y wrought metal clamps for use in connection with pipe joints of thebell and spigot type, and it consists in the novel features hereinafterdescribed, reference being had to the accompanying drawings whichillustrate two embodiments of the invention selected by me for thepurpose of illustrating the invention and said-invention is fullydisclosed in the following description and claims.

In said drawings, Fi ure l represents a view of a lead packe 'oint ofthetype known in the art as a att heson joint, form of clamp, the jointwith its applied clamp being shown partly in section and partly inelevation. Fig. 1 is an enlarged partial sectional view of the clampingring. Fig. 2 is a detail elevation of the clamping ring. Fig. 2 is anenlarged-partial section of the follower. F ig. 3 is a similar elevationof the follower or ull ring. Fig. 4 is a view similar to Fig. 1 showinga Mattheson joint having applied thereto. a repair clamp embodying aslight modification of my invention. Figs. 5, 6 and 7 are. detail viewsof a clamping ring similar to that shown in Fig. 4 but made in sectionsand rivetedtogather.

posit-ion and compressing a gasket (pre erbell end of the pipe section,to completely sealthe space between closed spigot'end of the ad'acentand connected pipe'sect'ion, and t ereby prevent leakage, in case thelead or other non-elastic as applied invention is an improvement in ofthe bell and the outer end of the.

the bell, andthe in-- packinginserted in said space, should not make aperfectly tight joint.

My improved clamp comprises a clamping ring to engage and compress thegasket, a follower or bull ring to engage the exterior of the bell, andconnecting bolts and nuts for drawing the clamping ring and followertowardceach other to effect 'the compression ofthe gasket.

While I have herein shown my invention to the well known Matthesonjoint, it is ed for use with any other form of bell an spi 0t oint.

eferring to the preferred form or embodim'ent of my inventionillustrated in Figs. 1, 2 and 3, 1 represents the bell end of aMattheson pipe section, the outer end of which is provided with theusual reinforcing ring 17 3 2 represents the spigot end of the adjacentpipe section, which is inserted in the bell; 3 represents the lead orother non-elastic packing inserted between the bell and spigot as shownand 4 represents an annular compressible or elastic gasket, pref: erablyformed of rubber, and substantially rectangular in cross the improvedclamping ring of my clamp, formed of wrought metal such as steel, andpreferably by pressing a blank of sheet steel into the desired form bymeans of suit able dies. The ring 5 may be made integral, as here shown,or it may be made in two or more segmental sections secured together bybolts or rivets. The blanks for these rings may be cut from sheet metalor formed by bending a flat plate in the plane of its width, and weldingthe ends together in case The clampthe ring is to be made integral. ingring 5 comprises an annular plate meminternal diameter than the spigotend of the pipe sections with which the ring is to be used, said wallvterminatingin an inwardly extending, gasket en aging flange 9 to whichit is connected y a sharply curved annular shoulder 10, which forms anannular projection for engaging the outer porsection. 5 represents her6, provided with a pluralityof bolt tion of the gasket and serves topartially confine the gasket, and also to compress it toward the spigot2, as will be apparent from an examination of Fig. 1. The plate memberlying between the exterior, stiffening flange and the interior wall 8,is greatly strengthened and stiffened thereby, thus enabling the ring tobe made of lighter material than could otherwise be used, and theannular curved portion also serves to further stiffen the ring structureand particularly the gasket engaging flange 9, which 18 preferablyformed by making a bend of the inner marginal portion of the the planeof the plate member, at the point indicated by-w-m in Fig. 1 where itjoins the annular projecting portion 10. The inner edge of the flange 9forms a circular pipe aperture to embrace the spigot end of a pipesection, and the gasket is engaged by the face of said flange farthestremoved from the plane of the plate member. The follower or bull ringwhich I prefer to employ, is shown at 11 and is also formed of steel andpreferably by pressing an annular blank of sheet steel into the requiredform. The follower comprises an annular plate member 12, provided withbolt holes, corresponding to those of the clamping ring, the said platemember being stiflened by bending the outer marginal portions angularlyto form the reinforcing flange 13, and the inner marginal portions arebent angularly to form a conical wall or flange 14 in- (lined to theaxis of the ring, and terminating at its inner end in an outwardly bentor flared portion 15 forming the rounded annular shoulder 16 which'is ofsuch diameter as to en age and fit against the shoulder or one of t eshoulders on the exterior of the bell end 1 ofa pipe section, in thisinstance the exterior shoulder of greatest diameter.

In assembling the parts of the clamp in connection with a joint of thebell and spigot type, the follower or bull ring is placed around thebell end of one section until it engages the exterior shouldered portionof the bell, the gasket 4 is placed in position around the spigot end ofthe adjacentsection, with its inner face in engagement with the bell endand the non-elastic pacln ing 3. The clamping ring is placed around thesaid spigot end of the adjacent sec-.

tion and moved into engagement with the packing and the bolts 22am thenpassed throng the bolt holes of the follower and clamping ring and thenuts are turned up thus compressing the packing ring against the spigot,the non-elastic packing, and the end of the bell," and producing aperfectly' tight joint. When these clamps are applied to'the joints atthe time of laying the pipe and sea-ling the joints thereof by meansofas lead or cement, eta, as is frequently the ring outwardly or in adirection away from.

wedge shaped overlapping portions, in a well known way.

The peculiar construction of the clamping ring and follower, as shown,provides great strength with a minimum of weight, for example in thefollower, the pressure of the bolts is transmitted by the inclined orconical wall 14 to the shoulder 16 of the bell, in the general directionof said wall 14, and in a very direct manner, and it is practicallyimpossible for said wall 14 to yield either inwardly or outwardly. Inthe case of the clamping ring the pressure of the bolts is transmittedby the annular wall 8 to thegasket engaging portions of the ring and tothe gasket, in the direct line of said well, and in both the clampingring and the follower the plate member is greatly stiffened by theexterior, flange, and interior wall, while the wall is further stiffenedby the bend or shoulder formed at its inner edge.

In Fig. 4 I have shown a slightly modified form of clamp applied to aMattheson joint in all respects similar to that shown in Fig. 1,- theparts in this figure being given the same reference numerals as thecorresponding parts in Fig. 1 with the addition of the letter a, as 1,etc; The follower 11 and clamping ring 5 shown in this figure may eachbe conveniently made by rolling a bar of wrought iron or steel of therequired cross section,'bending a portion of the bar of the requiredlength to make the ring into circular form and unitingthe ends bywelding, riveting or otherwise. The clamping ring 5 has an annular platememher 6, an annular-wall 8 extending sub stantially perpendicularlyfrom its inner edge, and areinforcingwall 7 at itsouter edge. The .wall8 terminates in an inwardly extending flange 9, the gasket engaging faceof which is on the side farther from-the plate member, and portionsremote from the pipe aperture, located a greater 2 distance from theplane of the plate member, than the portions adjacent to the pipe apeuture, thus forming an annular shoulder where the flange 9 joins the wall8, and facilitating the retention of the gasket. and its compressiontoward the pi e aperture, the metal bein of greater thie ess at theshoulder to sti en the ring and reinforce the :fi'ange member. Thefollower shown .in

Fig. 4. is constructed in substantiallythe 13-3 and forming In Figs. 5,6 and 7 I have shown a ring substantially of the section shown in Fig.4, formed in segments provided with perforated ears 20 united b bolts orrivets 21, rivets being herein s own, although obviously a bolt and nutcould be used in the place of the rivets or any of them if desired, andit is to be understood that the rings shown in Figs. 1, 2 and 3 may inlike manner be made in segments and provided with perforated ears bywhich said segments may be united by means of bolts or rivets, as

before stated.

What I claim and desire to secure by Letters Patent is 1. A clamp forpipe couplings of the bell and spigot type, comprising amon its members,a clamping ring. formed 0 wrought metal and having an annular platemember, an annular wall disposed an arly to the plate member andextending om the inner edge of the plate member, and an annular flangemember extending inwardly from the outer end of said wall and having apacking engaging face on the side farther from the plate member, theinner edge of said flange forming a circular pipe aperture, for engagingthe s igot end of a ipe section, and a follower ormed of wrong t metaland having an annular plate member, an annular wall disposed angularlythereto and extending from the inner edge of the plate member, and anannular flange portion, forming a pipe aperture of larger diameter thanthe pipe aperture of the clamping ring,

for enga 'ng the bell end of a pipe section, a gasket and clamping boltsand nuts for connecting the clamping rin and follower.

2. A clamp for pipe couplmgs of the bell and spigot type comprisingamong its members, a clamping ring, wrought metal and havin an annularplate member, an annular wal disposed angularly thereto and connected tothe plate member adjacent to its inner edge and an outwardly extendingflange member connected to the other end of said annular wall,

-a circular pipe aperture adjacent to the junction of said flange memberand wall, for engaging the exterior of a which diverge from a followerformed of portion will project be a gasket for said bell end of a pipesection,

connecting said clamping ring and bolts for clampin ring and follower.

3. A ollower for pipe couplin of the bell and spigot type formed 0pressed wrought sheet metal, and comprising an annular plate member, anannular conical wall extending from the inner edge of the plate member,and having its greatest diameter adjacent tothe plate member, said wallhaving at its opposite end an annular outwardly bent flange andproviding an annular rounded .portion ad]acent to the junction of saidwall and flange, for engaging the exterior of the bell end of a pipesection.

4. In a clamp for pipe couplings of the bell and spigot type, a ringformed of wrought metal an comprising an annular plate member havingbolt holes' therein, an annular wall extending from the inner edge ofthe plate member, substantially perpendicular thereto, and terminatingin a rounded annular portion, the inner portions of which diverge from aplane perpendicular to the axis of the ring, and extend in a directiontoward the plane of the plate member and an annular flange, extending inwardly from the said diverging portions of said rounded portion, theinner e ge of said flange forming a pipe aperture, having a gasketengaging face on farther from the plate member.

5. In a clamp for pipe couplings of the bell and spigot t pe; a ringformed of wrought-metal, and comprising an annular plate member havingbolt holes therein, an annular wall extending from the inner edge ofsaid plate member, substantially perpen dicular thereto, and terminatingin a round ed annular portion, the inner portions of aplane,perpendicular and extend in a dithe plate memthe side to the axisof the ring rection toward the plane of her, and an annular flange,disposed sub stantially perpendicularly to the axis of the ring,extending inwardly from and at an angle totlie said diverging portion ofthe annular rounded portion, t e inner edge of said flange forming apipe aperture, whereby the closely adjacent reverse bends will stifi'enthe ring at the junction of said flange with said annular wall, and saidrounded ond said flange in a direction away from t e plane of the platemember. I

In testimony whereof I aflix my signature, in the presence of twowitnesses.

. JAMES CLARK.

